<!DOCTYPE html>
<html>

<head>
	<meta charset="UTF-8" />
	<title>更新时的一个问题</title>
	<script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>
	<!-- 准备好一个容器-->
	<div id="root">
		<h2>人员列表</h2>
		<button @click="updateMei">更新马冬梅的信息</button>
		<ul>
			<li v-for="(p,index) of persons" :key="p.id">
				{{p.name}}-{{p.age}}-{{p.sex}}
			</li>
		</ul>
	</div>

	<script type="text/javascript">
		Vue.config.productionTip = false

		const vm = new Vue({
			el: '#root',
			data: {
				persons: [
					{ id: '001', name: '马冬梅', age: 30, sex: '女' },
					{ id: '002', name: '周冬雨', age: 31, sex: '女' },
					{ id: '003', name: '周杰伦', age: 18, sex: '男' },
					{ id: '004', name: '温兆伦', age: 19, sex: '男' }
				]
			},
			methods: {
				updateMei() {
					// this.persons[0].name = '马老师' //奏效
					// this.persons[0].age = 50 //奏效
					// this.persons[0].sex = '男' //奏效
					// this.persons[0] = {id:'001',name:'马老师',age:50,sex:'男'} //不奏效
					this.persons.splice(0, 1, { id: '001', name: '马老师', age: 50, sex: '男' })
				}
			}
		})

	</script>

</html>